Main Entry: 1steam
Pronunciation: stm
Function: noun1 a: the invisible vapor into which water is changed when heated to the boiling point b: the mist formed when water vapor cools2: water vapor kept under pressure so as to supply energy for heating, cooking, or mechanical work; also: the power so generated3 a: driving force : POWER <arrived under their own steam> b: built-up tension <let off a little steam>